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Polyamines reduces lipid peroxidation induced by different pro-oxidant agents
Nádia Aléssio Velloso Bellé1, Gerusa Duarte Dalmolin, Graciela Fonini
1Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Campus UFSM, Santa Maria, RS 97105-900, Brazil.
Brain Research
|May 18, 2004
Summary
Polyamines like spermine and spermidine act as antioxidants, reducing free radicals and lipid peroxidation in the brain. These compounds demonstrate significant free radical scavenger properties, protecting against oxidative stress.
Area of Science:
- Biochemistry
- Neuroscience
- Pharmacology
Background:
- Polyamines possess antioxidant and free radical scavenging functions.
- Quinolinic acid (QA), sodium nitroprusside (SNP), and iron ions (Fe+2) are known to induce free radical production and lipid peroxidation.
- Oxidative stress is implicated in various neurological conditions.
Purpose of the Study:
- To investigate the free radical and aldehyde scavenger effects of spermine and spermidine.
- To assess the impact of these polyamines on thiobarbituric acid reactive species (TBARS) production induced by specific agents in rat brain tissue.
- To explore the potential involvement of NMDA receptors in the observed effects.
Main Methods:
- Measurement of TBARS production in rat brain homogenates.
- Induction of TBARS using QA, SNP, Fe+2/EDTA system, and free Fe2+.
- Administration of polyamines (spermine, spermidine), MK-801, and arcaine to evaluate their effects.
Main Results:
- Spermine and spermidine inhibited QA-induced TBARS production, with spermine showing stronger antioxidant activity.
- Both polyamines demonstrated modest inhibition of TBARS production induced by SNP, Fe+2/EDTA, and free Fe2+.
- The inhibitory effect of polyamines on QA-induced TBARS was enhanced in the presence of MK-801, and arcaine did not alter this effect.
Conclusions:
- Polyamines, spermine and spermidine, exhibit significant antioxidant and free radical scavenger properties in the rat brain.
- The observed protective effects are attributed to direct antioxidant mechanisms rather than NMDA receptor activation.
- These findings highlight the potential therapeutic role of polyamines in conditions associated with oxidative stress.